An Etymological Dictionary of the German Language/Annotated/Kranz
Kranz, masculine, ‘wreath,’ from the equivalent Middle High German and late Old High German kranz, masculine; a specifically High German word, which in this form has passed within historic times into other Teutonic languages (Icelandic krans, Dutch krans). Perhaps allied to Sanscrit granth, ‘to tie (a knot), bind,’ granthi-s, masculine, ‘knot,’ or even with Lithuanian grandis, masculine, ‘bracelet, tyre of a wheel’ (Lettic grůdi, ‘wood for framing,’ from the base *grandai).